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-rw-r--r--gcc/function.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/function.c b/gcc/function.c
index 8f614b69ed6..7cff9002014 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -2332,6 +2332,11 @@ assign_parm_find_stack_rtl (tree parm, struct assign_parm_data_one *data)
stack_parm = gen_rtx_MEM (data->promoted_mode, stack_parm);
set_mem_attributes (stack_parm, parm, 1);
+ /* set_mem_attributes could set MEM_SIZE to the passed mode's size,
+ while promoted mode's size is needed. */
+ if (data->promoted_mode != BLKmode
+ && data->promoted_mode != DECL_MODE (parm))
+ set_mem_size (stack_parm, GEN_INT (GET_MODE_SIZE (data->promoted_mode)));
boundary = data->locate.boundary;
align = BITS_PER_UNIT;